Swimming - King and Efimova advance for possible rematch

By Mark Trevelyan RIO DE JANEIRO (Reuters) - Two days after their tense clash in the final of the 100 metre breaststroke, Lilly King of the United States and Russia's Yulia Efimova both came through their morning heats in the 200m, but well behind leader Rikke Moller Pedersen of Denmark. King, gold medallist in the 100, was fifth in her heat and squeezed through in 15th place out of 16 to Wednesday evening's semi-finals with a time of two minutes 25.89 seconds. Efimova, the silver medallist on M